An appraisal principle that says, among dissimilar properties, the value of the higher quality properties will decrease because of the presence of lower quality or inferior properties.

An appraisal principle that states that between dissimilar properties the value of the better-quality property is affected adversely by the presence of the lesser-quality property. (See appraisal)

A principle of valuation, stating that a property's value may decrease due to the existence of similar properties in similar locations, containing lower quality.

Appraisal term stating that the value of higher-end real estate can be brought down by the proximity to lower-end properties.

The principle that the value of a better-quality property is adversely affected by the proximity of a lesser-quality property.